Algebra Examples

$9 (3 s - 3 t) - 2 t - 10 (8 t + s) \cdot 9 (3 s - 3 t) - 2 t - 10 (8 t + s)$

Step 1

Simplify each term.

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Step 1.1

Apply the distributive property.

$9 (3 s) + 9 (- 3 t) - 2 t - 10 (8 t + s) \cdot (9 (3 s - 3 t)) - 2 t - 10 (8 t + s)$

Step 1.2

Multiply $3$ by $9$ .

$27 s + 9 (- 3 t) - 2 t - 10 (8 t + s) \cdot (9 (3 s - 3 t)) - 2 t - 10 (8 t + s)$

Step 1.3

Multiply $- 3$ by $9$ .

$27 s - 27 t - 2 t - 10 (8 t + s) \cdot (9 (3 s - 3 t)) - 2 t - 10 (8 t + s)$

Step 1.4

Apply the distributive property.

$27 s - 27 t - 2 t + (- 10 (8 t) - 10 s) \cdot (9 (3 s - 3 t)) - 2 t - 10 (8 t + s)$

Step 1.5

Multiply $8$ by $- 10$ .

$27 s - 27 t - 2 t + (- 80 t - 10 s) \cdot (9 (3 s - 3 t)) - 2 t - 10 (8 t + s)$

Step 1.6

Apply the distributive property.

$27 s - 27 t - 2 t + (- 80 t - 10 s) \cdot (9 (3 s) + 9 (- 3 t)) - 2 t - 10 (8 t + s)$

Step 1.7

Multiply $3$ by $9$ .

$27 s - 27 t - 2 t + (- 80 t - 10 s) \cdot (27 s + 9 (- 3 t)) - 2 t - 10 (8 t + s)$

Step 1.8

Multiply $- 3$ by $9$ .

$27 s - 27 t - 2 t + (- 80 t - 10 s) \cdot (27 s - 27 t) - 2 t - 10 (8 t + s)$

Step 1.9

Expand $(- 80 t - 10 s) (27 s - 27 t)$ using the FOIL Method.

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Step 1.9.1

Apply the distributive property.

$27 s - 27 t - 2 t - 80 t (27 s - 27 t) - 10 s (27 s - 27 t) - 2 t - 10 (8 t + s)$

Step 1.9.2

Apply the distributive property.

$27 s - 27 t - 2 t - 80 t (27 s) - 80 t (- 27 t) - 10 s (27 s - 27 t) - 2 t - 10 (8 t + s)$

Step 1.9.3

Apply the distributive property.

$27 s - 27 t - 2 t - 80 t (27 s) - 80 t (- 27 t) - 10 s (27 s) - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10

Simplify and combine like terms.

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Step 1.10.1

Simplify each term.

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Step 1.10.1.1

Rewrite using the commutative property of multiplication.

$27 s - 27 t - 2 t - 80 \cdot 27 t s - 80 t (- 27 t) - 10 s (27 s) - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.2

Multiply $- 80$ by $27$ .

$27 s - 27 t - 2 t - 2160 t s - 80 t (- 27 t) - 10 s (27 s) - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.3

Rewrite using the commutative property of multiplication.

$27 s - 27 t - 2 t - 2160 t s - 80 \cdot - 27 t \cdot t - 10 s (27 s) - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.4

Multiply $t$ by $t$ by adding the exponents.

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Step 1.10.1.4.1

Move $t$ .

$27 s - 27 t - 2 t - 2160 t s - 80 \cdot - 27 (t \cdot t) - 10 s (27 s) - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.4.2

Multiply $t$ by $t$ .

$27 s - 27 t - 2 t - 2160 t s - 80 \cdot - 27 t^{2} - 10 s (27 s) - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.5

Multiply $- 80$ by $- 27$ .

$27 s - 27 t - 2 t - 2160 t s + 2160 t^{2} - 10 s (27 s) - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.6

Rewrite using the commutative property of multiplication.

$27 s - 27 t - 2 t - 2160 t s + 2160 t^{2} - 10 \cdot 27 s \cdot s - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.7

Multiply $s$ by $s$ by adding the exponents.

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Step 1.10.1.7.1

Move $s$ .

$27 s - 27 t - 2 t - 2160 t s + 2160 t^{2} - 10 \cdot 27 (s \cdot s) - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.7.2

Multiply $s$ by $s$ .

$27 s - 27 t - 2 t - 2160 t s + 2160 t^{2} - 10 \cdot 27 s^{2} - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.8

Multiply $- 10$ by $27$ .

$27 s - 27 t - 2 t - 2160 t s + 2160 t^{2} - 270 s^{2} - 10 s (- 27 t) - 2 t - 10 (8 t + s)$

Step 1.10.1.9

Rewrite using the commutative property of multiplication.

$27 s - 27 t - 2 t - 2160 t s + 2160 t^{2} - 270 s^{2} - 10 \cdot - 27 s t - 2 t - 10 (8 t + s)$

Step 1.10.1.10

Multiply $- 10$ by $- 27$ .

$27 s - 27 t - 2 t - 2160 t s + 2160 t^{2} - 270 s^{2} + 270 s t - 2 t - 10 (8 t + s)$

Step 1.10.2

Add $- 2160 t s$ and $270 s t$ .

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Step 1.10.2.1

Move $t$ .

$27 s - 27 t - 2 t + 2160 t^{2} - 270 s^{2} - 2160 s t + 270 s t - 2 t - 10 (8 t + s)$

Step 1.10.2.2

Add $- 2160 s t$ and $270 s t$ .

$27 s - 27 t - 2 t + 2160 t^{2} - 270 s^{2} - 1890 s t - 2 t - 10 (8 t + s)$

Step 1.11

Apply the distributive property.

$27 s - 27 t - 2 t + 2160 t^{2} - 270 s^{2} - 1890 s t - 2 t - 10 (8 t) - 10 s$

Step 1.12

Multiply $8$ by $- 10$ .

$27 s - 27 t - 2 t + 2160 t^{2} - 270 s^{2} - 1890 s t - 2 t - 80 t - 10 s$

Step 2

Simplify by adding terms.

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Step 2.1

Subtract $10 s$ from $27 s$ .

$17 s - 27 t - 2 t + 2160 t^{2} - 270 s^{2} - 1890 s t - 2 t - 80 t$

Step 2.2

Subtract $2 t$ from $- 27 t$ .

$17 s - 29 t + 2160 t^{2} - 270 s^{2} - 1890 s t - 2 t - 80 t$

Step 2.3

Subtract $2 t$ from $- 29 t$ .

$17 s + 2160 t^{2} - 270 s^{2} - 1890 s t - 31 t - 80 t$

Step 2.4

Subtract $80 t$ from $- 31 t$ .

$17 s + 2160 t^{2} - 270 s^{2} - 1890 s t - 111 t$

Step 2.5

Reorder.

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Step 2.5.1

Move $17 s$ .

$2160 t^{2} - 270 s^{2} - 1890 s t + 17 s - 111 t$

Step 2.5.2

Move $2160 t^{2}$ .

$- 270 s^{2} - 1890 s t + 2160 t^{2} + 17 s - 111 t$